The primary component of the ductile iron access cover, also known as nodular iron, is ductile iron. Modularity affects quality. In the casting process, anti-rust asphalt paint is frequently applied. In other words, asphalt is typically sprayed on the surface of ductile iron manhole covers to prevent rusting.
For applications requiring high strength, ductility, toughness, abrasion resistance, severe thermal and mechanical shock, high temperature or low-temperature resistance, corrosion resistance, and dimensional stability, ductile iron castings have been used in nearly all the major industrial sectors. Many of the current grades of ductile iron offer mechanical properties and a very broad range of physical attributes to satisfy the requirements of the use of these variations.
Ductile iron chamber cover characteristics :
A Powerful
Ductile iron has a yield strength of more than 300MPa and tensile strength of more than 420Mpa. It is more than three times as much as gray iron, just like low-carbon steel.
Strong Tenacity
The impact value is 10 times greater than gray iron and comparable to carbon steel.
High Plasticity
The elongation rate is higher than 7%, which is comparable to materials made of high-carbon steel and gray iron.
Resistance to Corrosion
The ductile iron chamber cover performed well in the 90-day spray corrosion test, but the corrosion rate was only 0.25 times higher than that of pipelines and 0.1 times higher than that of gray cast iron pipes. The service life is twice as long as pipes made of ordinary steel and gray cast iron.
Cast iron has more corrosion and oxidation resistance than steel in the majority of municipal applications, including those involving water, salt water, steam, etc. Nodular graphite cast iron has superior vibration absorption capabilities than steel because of its spherical graphite microstructure.
So, when you are about to start planning to buy a manhole cover in India, then you must remind the mentioned perks of ductile iron chamber covers to get the best results and to bring you the top results, BIC is there to assist.
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